A swan sits at the center of a perfectly circular lake. At an edge of the lake stands a ravenous monster waiting to devour the swan. The monster can not enter the water, but it will run around the circumference of the lake to try to catch the swan as soon as it reaches the shore. The monster moves at 4 times the speed of the swan, and it will always move in the direction along the shore that brings it closer to the swan the quickest. Both the swan and the the monster can change directions in an instant.
The swan knows that if it can reach the lake's shore without the monster right on top of it, it can instantly escape into the surrounding forest.

How can the swan successfully escape?

Take away the whole and some still remain. What is it?

What does this rebus puzzle means ?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

You need to arrange three 7 and mathematical symbols to form number 1?